<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
        private $_id;
	public function authenticate()
	{
		$user=User::model()->findByAttributes(array('username'=>$this->username));
                if($user===null)
                {
                        $this->errorCode=self::ERROR_USERNAME_INVALID;
                }
                else 
                {
                        if($user->password!==$user->encrypt($this->password))
                        {
                                        $this->errorCode=self::ERROR_PASSWORD_INVALID;
                        }
                        else
                        {
                                $this->_id = $user->id;
                                if(null===$user->last_login)
                                {
                                        $lastLogin = time();
                                }
                                else
                                {
                                        $lastLogin = strtotime($user->last_login);
                                }
                                $this->setState('lastLoginTime', $lastLogin);
                                $user->password=$this->password;
                                $user->last_login=new CDbExpression('NOW()');
                                $user->save();
                                $this->errorCode=self::ERROR_NONE;
                        }
                }
                return !$this->errorCode;
	}
        
        public function getId()
        {
            return $this->_id;
        }
}

?>
